山东半岛典型流域果园与旱地景观结构分析

以烟台市土地利用现状图和2002年9月9日的ETM影像为信息源,结合地面考察,在3S技术的支持下,选取景观百分比、斑块密度、周长-面积分维数和斑块凝聚度,对烟台市16个典型流域的果园与旱地景观结构进行了分析。结果表明,果园在各流域中的面积比重较小,旱地面积占绝对优势;但果园斑块数量多。对各种景观指数比较表明,旱地的平均景观百分比明显高于果园景观,果园景观的平均、最大及最小斑块密度均明显高于旱地景观,两种景观的周长-面积分维数相差不大但斑块凝聚度的差异显著。

Analysis on landscape structure of orchard and non-irrigable cropland in the typical basins of Shandong Peninsula

Based on 3S techniques, the study compared the landscape structures of orchard and no-irrigable cropland of 16 typical basins in Yantai City by using the land-use-map of Yantai City and the Landsat TM image in Sept. 9, 2002. The percentage of landscape, patch density, perimeter-area fractal dimension and patch cohesion index were calculated by using Fragstats 3.3. The results show that though Yantai City is famous for its vegetables and fruits, the proportion of orchard is not the largest in area. Non-irrigable cropland landscapes are dominant in area and orchard landscapes are dominant in patch number. The conclusion made through comparing different landscape indices is that the average percentage of non-irrigable cropland landscape is higher than that of orchard landscape. The average, the largest and the smallest patch densities of orchard landscape are higher than those of non-irrigable cropland landscape obviously. No significant difference between orchard landscape and non-irrigable cropland landscape in perimeterarea fractal dimension is observed, but there are great changes from orchard landscape to non-irrigable cropland landscape in patch cohesion index.